More than 100 officers form 33 law enforcement departments turned out Monday to remember Vaughn Olson, a St. Charles police officer who died Aug. 2 from injuries sustained in a crash three weeks earlier.

“Vaughn was the kind of guy that was quiet and unassuming, yet at the same time he’d do anything for you,” police spokesman Paul McCurtain said.

Friends and family gathered at Yurs Funeral Home and then at Little Rock Township Cemetery in Plano to pay their final respects to the 15-year veteran. Police Chief Jim Lamkin presented a city of St. Charles flag to Olson’s fiancé, Christie Hurley. The Kane County SWAT Team, of which Olson was a member, also presented Hurley with flag.

“Anybody on the SWAT Team is a cut above,” officer Jeff Finley said. “Vaughn (Olson) was a top notch officer, a tremendously strong guy.”

Olson, 41, and fellow officer Michael Griesbaum were returning from a SWAT Team call when they and two others were seriously injured in a head-on collision July 14 in the town of Virgil.

Griesbaum, who was driving, and Olson were traveling west on Route 38 when their minivan collided with an oncoming Ford Taurus.

Griesbaum told authorities he swerved left to avoid a car that was entering the intersection from Meredith Road, according to Lt. Pat Gengler of the Kane County Sheriff’s Department.

“We’re trying to track that (the car) down, through interviews, and trying to figure out if there was in fact a third car there,” sheriff’s Lt. Pat Gengler said.

The Taurus’ driver, Mitchell Westerlin, 19, and his passenger Melanie Carlson, 18, both of Elburn, were hospitalized but have since been released. Griesbaum has also been released.

News of Olson’s death shocked his fellow officers, many of whom had expected him to return to work by the end of the month.

“Everybody thought he was well out of the woods,” Finley said. “He looked good, talked good, he was remembering things.”

Olson was staying at Marionjoy Rehabilitation Center and appeared to be improving, even using a walker to get around despite the screws holding his hip together, Finley said. But then hospital staff found Olson unresponsive and not breathing on his hospital bathroom floor at about 10:45 a.m. Aug. 2.

Winfield Fire Department and hospital personnel tried to revive Vaughn for 45 minutes before he was pronounced dead at 11:30 a.m.

Preliminary results from an Aug. 3 autopsy by the DuPage County Coroner’s Office indicate Olson died of a pulmonary embolism, a blood clot that blocks blood supply to the lungs. An official autopsy report is on hold, pending toxicology and lab results, which could take several more weeks.

Olson had many jobs during his 15 years with the police department. Most recently, he was a member of the traffic division and a long-time member of the Tactical Response Team, which merged with the county SWAT Team.

“A large part of his job was to perform traffic studies and to do traffic crash reconstruction and he was very good at it,” McCurtain said. “We’re going to miss him.”